| Influence of circumferential solar heat flux distribution on the heat transfer coefficients of linear Fresnel collector absorber tubes IF Okafor, J Dirker, JP Meyer Solar Energy 107, 381-397, 2014 | 38 | 2014 |
| Preparation of environmental friendly bio-coal briquette from groundnut shell and maize cob biomass waste: comparative effects of ignition time and water boiling studies TU Onuegbu, NO Ilochi, IM Ogbu, FO Obumselu, I Okafor Current Research in Chemistry 4 (4), 110-118, 2012 | 32 | 2012 |
| Influence of non-uniform heat flux distributions on the secondary flow, convective heat transfer and friction factors for a parabolic trough solar collector type absorber tube IF Okafor, J Dirker, JP Meyer Renewable energy 108, 287-302, 2017 | 28 | 2017 |
| F-chart method for designing solar thermal water heating systems IF Okafor, G Akubue International Journal of Scientific & Engineering Research 3 (9), 1-7, 2012 | 28 | 2012 |
| Enhancing the Efficiency of coal Briquette in Rural Nigeria using pennisetum purpurem. TU Onuegbu, IM Ogbu, NO Ilochi, I Okafor, OF Obumselu, UE Ekpunobi Advances in Natural and Applied Sciences,, 2010 | 21 | 2010 |
| Lithostratigraphy of the Maastrichtian Nsukka Formation in the Anambra Basin, SE Nigeria UM Uzoegbu, UA Uchebo, I Okafor IOSR Journal Of Environmental Science, Toxicology, and Food Technology 5 (5 …, 2013 | 17 | 2013 |
| Performance evaluation of nozzle type improved wood cook stove. IF Okafor, GO Unachukwu | 16 | 2012 |
| Integration of perennial grass into energy mix as alternative to fuelwood in selected Niger Delta communities, Nigeria MU Ajieh, K Owebor, LC Edomwonyi-Otu, IF Okafor Biomass Conversion and Biorefinery, 1-12, 2021 | 12 | 2021 |
| Fuel briquettes technology can save Nigeria’s trees CG Uzoma, CC Okafor, IF Okpara Cont. J. Environ. Sci 5 (1), 20-28, 2011 | 11 | 2011 |
| Measuring energy efficiency of the public passenger road transport vehicles in Nigeria IF Okafor, GO Unachukwu, AO Odukwe Transport Policy 35, 319-325, 2014 | 10 | 2014 |
| Asymmetrical non-uniform heat flux distributions for laminar flow heat transfer with mixed convection in a horizontal circular tube IF Okafor, J Dirker, JP Meyer Heat transfer engineering 40 (1-2), 109-127, 2019 | 8 | 2019 |
| Energy efficient biomass cookstoves: Performance evaluation, quality assurance and certification IF Okafor Ence J Energy Eng 7, 54-62, 2019 | 6 | 2019 |
| Utilization of agricultural waste in the production of charcoal briquette blend as alternative source of energy CI Nwankwo, TU Onuegbu, IF Okafor, PC Igwenagu IOP Conference Series: Earth and Environmental Science 1178 (1), 012015, 2023 | 4 | 2023 |
| Condensation inside smooth and inclined smooth tubes at low mass fluxes: A quick review DRE Ewim, IF Okafor IOP Conference Series: Earth and Environmental Science 730 (1), 012044, 2021 | 4 | 2021 |
| Production of Smokeless Briquette Fuel from Sub-bituminous Coal for Domestic and Industrial Uses IF Okafor, CN Anyanwu Science Journal of Energy Engineering 12 (3), 33-39, 2015 | 3 | 2015 |
| A Review of Advances on Natural Dye Sensitized Solar Cells (NDSSCs) KP Alor, BA Ezekoye, PE Ugwuoke, SU Offiah, FI Ezema, S Akor, ... Journal of Engineering Research and Reports 25 (10), 153-166, 2023 | 2 | 2023 |
| Decomposition effects of energy and co2 intensities in the Nigerian economy: A logarithmic mean weight divisia index (LMDI) analysis. CE Nnaji, IF Okafor, GU Akubue, CC Uzoma, EF Onyekaozuru, CI Adagba IOP Conference Series: Earth and Environmental Science 1178 (1), 012009, 2023 | 2 | 2023 |
| Deployment of energy technologies for sustainable rural agricultural development in Nigeria BN Onah, IF Okafor, DN Oyigbo, KN Nnate IOP Conference Series: Earth and Environmental Science 730 (1), 012039, 2021 | 2 | 2021 |
| Optical Design and Performance Analysis of Linear Focusing Solar Thermal Collectors IF Okafor International Journal of Systems Engineering2019 3 (1), 9-16, 2019 | 2 | 2019 |
| Biogas production from Jatropha curcas leaf and its blends with other wastes under changing meteorological parameters EO Uzodinma, IF Okafor, CN Anyanwu Nigerian Journal of Solar Energy 25, 73-79, 2014 | 2 | 2014 |
